One thing you cannot have too much of is storage on a pop-up camper. Instead of putting the sewer hose in the square bumper (causes abrasions to the hose and accelerates rust inside the bumper), I added ammunition cans to each end of the rear bumper after painting them black, putting a strip of rubber conveyor belt material between the bumper and the can, as well as a strip inside the can for protecting the bottom from bumps and bangs. The left unit holds everything for handling black water. The right unit hold everything for handling gray water and other misc. supplies.